Safety-guard for agricultural implements.



A. POHL.

SAFETY GUARD FOR AGRICULTURAL IMPLEMENTS. APPLICATION FILED MAR. 19,1913.

Patented Sept. 30, 1913.

Quorum COLUMBIA PLANOGRAPH cu. WASHINGTON, D. c.

PATENT OFFICE.

Anrrnun POHL, or BLOOMFIELZD, NEBRASKA.

SAFETY-GUARD FOB. AGRICULTURAL IMPLEMENTS.

Specification of Letters Patent.

Patented Sept. 30, 1913.

7 Application filed March 19, 1913. Serial No. 755,422.

T 0 all whom it may concern Be it known that I, ARTHUR Pom, a citizen ofthe United States, residing at Bloomfield, in the county of Knox andState of Nebraska, have invented certain new and useful Improvements in"Safety-Guards for Agricultural Implements; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such aswill enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to guards for agricultural implements, and moreparticularly for disk harrows, land rollers, etc.

The primary object of the invention is to provide a movable safety guardhaving means connected therewith for normally retaining it in suchrelation to a roller or disks that the operation thereof isnotinterfered with, and at the same time, allowing the shield or guard tomove into such relation to the roller as to render them inoperative, incase of certain accidents or necessities.

Another object of the invention is'to provide a device of this characterwhich is entirely automatic in its operation.

Another object is to provide ashieldof this character which not onlyshields the operator and the draft animal from danger of beingrunoverbythe agricultural implement, in case of his team attempting to a runaway, but actually and effectively prevents the team from running away..

In the accompanying drawings, Figure'l is a plan view of a disk harrowhaving my improved shield mounted thereon. Fig. 2 is a side elevation ofa disk harrow and shield shown in Fig. 1, and, Fig. 3 is averticalsectional view on the line 3+3 of Fig. 1, illustrating the shield inclosed or disk looking position.

Referring to the drawings, in which similar reference characterscorrespond with like parts throughout the several views, the disk harrowmechanism is only illustrated for the purpose of showing the mount of myimproved shield, and it should be clearly understood that such shield isquicklyapplicable to a land roller, and that the principles involved mayalso be applied to other classes of farm implements and machinery. Theform of disk harrow illustrated consists of the tongue 5, lateral bars6, forward struts 7 and rear struts 8: The bars 6 are supported bybearings 7 journaled on axle 8, supported by and rotatable with thedisks or other rotary elements 9. Standards 10 are securedon the rearends of the bars 6, extending upwardly and rearwardly therefrom, andhave secured through the upper ends thereof a shaft or pivot 14. Fromthe pivot point 14: the standards are extended downwardly and rearwardlyand curved in conformity with the peripheral surface of the rotaryelement 9, as at 11. A two part guard 12 is pivoted over the pivot 14and extends downwardly and rearwardly therefrom and normally rests uponthe downwardly extending portions 11 of thestandards 10. A second orforward guard 13pis also hinged to the pivot 1A and is normally held inupper or open position by the means hereinafter described. V

As shown in Figs. 2 and 3, the forward and rear guards 13 and 12,respectively, rep

resent in cross section, segments of a circle of somewhat largerdiameter than that of the disk elements 9. The guard 13 is formed in twoparts, as indicated by the dotted line in Fig. 1, and is formed withslots 15 through which the bars 6 extend, said slots being of sufficientlength to permit a considerable swing of the element 13 upward anddownward. The lower edge of the plate 13 carries one or morelongitudinally extending" angle beams 16 and 17 which are rigidlysecured thereto by any proper means. A notched segment 18 is mountedupon the tongue 5 and forms a central bearing for the crank shaft 19,the ends of which are supported in bearings 20 carriedby the lateralbars 6. The arms 21 of the crank shaft are pivotally connected withlinks 22, each of which is connectedat 23 with a part of the forwardguard 13. Rigidly secured upon the shaft 19 adjacent the notched segment18 is an operating lever 24 carrying the pawl or latch 25,'which latterengages with the notch 26. The latch 25is pivoted through a slot in thelever 24 and extends upon the opposite side thereof, a spring 27 beingprovided for holding the latch out of the notches. .A foot rest or pedal28 is formed on the'free end ofthe latch, and a handle 29 The forwardguard 13 also prov desan efli is formed on the end of the lever 24'.

An ordinary driverseat 30 is mounted on the frame, and is locatedrearwardly of the lever 24 and its adjuncts, so that the handle 29 maybe grasped for swinging the" lever rearward so as to coact with theelements 19, and 22 for swinging the shield 13 upward into openposition.

In order to prevent the shields 12 and 1 from jostling and rattling attheir pivotal connection, a retractable spring 27 is secured at oppositeends to the front and rear shields 13 and 12 respectively. This springimpact.

also assists gravity in quickly drawing the shield 13 to closed positionin case of emergency. V

In operation, the driver sits on the seat 30 with one foot on the pedal28 so as to hold the latch 25'within the notch 26; having first drawnthe lever 24 rearwardly, into the position illustrated. lVhile thusholding the shield 13 in its upper and open position, the machine may bedrawn over the land and operated in the usual manner. However, in caseofan accident or contingency that will cause the driver to fall from'hisseat 30, -and he should fall back wardly or laterally, he will beprotected from falling on the sharp edges of the disks 9 by means of theshield elements 12 and 13, especially the latter, which being higherthan the two, will sustain the greater This element 13 as well as thecrank shaft 19 are made of somewhat springy material and so the impactof the fall will be considerably diminished. In the foregoing, we haveassumed that one footof the operator has remained on the lever 28 whilehe was falling, but in case of such contingency that would pitch thedriver forward, so as to dislodge his foot from the pedal 28 and heshould fall upon the ground in front of the machine, it is obvious thathe would be in imminent peril of being mutilated by the disks 9 unlesssome means of prevention be immediately employed. Now, it will beobserved, that as soon as the operators foot becomes dislodged from thepedal 28 even before he has completed his fall, the spring 27 pulls thelatch 25 out of engagement with the segment 18 so that the shield 13automatically moves into closed position, or that illuschored to theground and cient means for preventing the draft animals from runningaway, and. 1t is only necessary for the operator to release the latch 25to permit the guard to drop down wardly and assume the position shownFig. 3' so that the machine is securely an:

movement thereover.

It will be seen that I have provideda pable of attaining the foregoingobjects, in v a thoroughly practical and efficient manner.

device of this character which is fullycas I do not limit myself to theexact de: tails of construction, combination and relation'of parts, asherewith illustrated and de scribed, but my invention may only belimited by a reasonable interpretation of the claims. 7

I claim:

1. In combination with ayrollerhaving means associated therewith wherebyit may be caused to roll upon the ground amo'vable shield supported overthe roller and adapted to be normally held above. the ground by anoperator and to swing clownward into engagement with the ground and intocontact with the roller, for stopping the motion of the roller 2. Incombination with a roller having means associated therewith whereby itmay be caused to rollupon the ground, a mov:

able shield supported over .the roller and 7 8 adapted to be normallysecured abovethe ground by an operator and to swing down: ward intoengagement; with the ground when, released by the operator, for stoppingthe motion of the roller. I

3. In an attachmentfor a machine having rollers adapted to roll upon theground,-a movable guard hingedly supported above the roller, a'crank-shaft in connection with the roller, a link connecting thecrank-shaft I with. the guard,'a lever secured to the crank shaft, anotched segment concentric with the crank-shaft, a latch carried bythelever and adapted to be held in a notch of the segment by anoperator, and to coactxwith the segment and with the 'crank-sha'ft 'andlink for holding the guard in an elevatedposition, said :latchhavingmeans associated therewith for automatically releasing it from the notchwhen the latch is released by the operator. 7

4. A guard for a disk-harrow or roller consisting of a curved plateofsomewhat springy material and normally supported over the disks ofsaid disk harrow and out of contact with the ground, for preventingprevented from a person from falling onto said disks and name to thisspecification in the presence of for minimizing the impact of the fall,and two subscribing witnesses.

means associated with the guard for holding it in its normal positionand allowing ARTHUR POHL' 5 it to automatically engage with the groundWitnesses:

when said person falls. CARL G. STOLL, In testimony whereof I havesigned my W. D. FUNK.

or five cents each, by addressing the Commissioner of Patents,

Copies of this patent may be obtained 1 'Washington, D. G.

